TY JOUR TI The effect of a biostimulator on the root formation of poplar cuttings Pyramidal-sedge Kamyshinsky KW amino acids KW biostimulator KW root formation of cuttings KW Pyramid-sedge Kamyshinsky poplar KW collagen JO Forestry Engineering Journal AU Bryndina, L.V. AU Repnikova, L.A. AU Korchagina, A.Y. AU Zhivitchenko, D.I. AU Posmetev, V.V. AU Manukovsky, A.Y. PY 2025 IS 15 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov